Which of the following correctly represents 180 g of water? (i) 5 moles of water (ii) 10 moles of water (iii) 6.023 × 1023 molecules of water (iv) 6.023 × 1024 molecules of water

Question

Which of the following correctly represents 180 g of water? (i) 5 moles of water (ii) 10 moles of water (iii) 6.023 × 1023 molecules of water (iv) 6.023 × 1024 molecules of water (A) (i) and (ii) (B) (i) and (iv) (C) (ii) and (iv) (D) (ii) and (iii)

Tardigrade Admin · Accepted Answer

18 g of H2O =1 mol 180 g of H2O = 10 mol 18 g of H2O = 6.023× 1023 molecules of H2O 180 g of H2O = (6.023× 1023/18) × 180 = 6.023× 1024 molecules of H2O

Q. Which of the following correctly represents $180 g$ of water?
(i) $5$ moles of water
(ii) $10$ moles of water
(iii) $6.023 \times 1 0^{23}$ molecules of water
(iv) $6.023 \times 1 0^{24}$ molecules of water

(i) and (ii)

(i) and (iv)

(ii) and (iv)

(ii) and (iii)

$18 g$ of $H_{2} O = 1$ mol
$180 g$ of $H_{2} O = 10$ mol
$18 g$ of $H_{2} O = 6.023 \times 1 0^{23}$ molecules of $H_{2} O$
$180 g$ of $H_{2} O = \frac{6.023 \times 1 0 ^{23}}{18} \times 180$
$= 6.023 \times 1 0^{24}$ molecules of $H_{2} O$

Q. Which of the following correctly represents 180g of water? (i) 5 moles of water (ii) 10 moles of water (iii) 6.023×1023 molecules of water (iv) 6.023×1024 molecules of water